Who’s egg is this?

[KyKyMarie77]

So I have this egg that I believe is from my cuckoo Maran a, but I’m wanting to double check. In my flock I have a white leghorn, polish crested, cuckoo Maran, salmon favorelle, calico princess, sapphire splash, light Brahma, midnight majesty Maran, and a silver laced wyandotte(idt she’s laying any more tho). I recently had a chick hatch from one of these as well that came out it’s 5 toes and feathered feet so that’s why I’m a bit stuck on who’s egg it is. Although I’m starting to think maybe the mama hen at the egg that one hatched out of before I could see it and I just saw this broken shell but that could be wrong. Anyways does anybody have any ideas?

 

[Fluffy Lambs]

Salmon favorolles have 5 toes. I don't have those though so don't know what color eggs they lay.